atoms, ions, & isotopes
protons= 11
neutrons= 12
Na-23
Particle that is capable of penetrating skin and causing damage like skin burns
beta particle
What does a roman numeral in a chemical name indicate?
The charge of a transition metal
What is a chemical reaction?
The breaking bonds and forming of new bonds to create products the have different properties than the reactants.
How many "things" are in a mole
6.02 x 1023 "things"
(atoms, particles, molecules)
Charge of Strontium with 36 electrons
+2
Not a particle; purely energy; most harmful
Frequently accompanies emissions of alpha and beta particles
Gamma radiation
When do you use numerical prefixes in a chemical name?
Covalently bonded molecules
Zn + 2HCl --> ZnCl2 + H2
What type of reaction?
single replacement
What volume of space does 1 mole of any gas occupy at STP?
22.4 L
How many neutrons in carbon-14?
8
Emission of an electron after the conversion of a neutron to a proton.
beta decay
What is the formula for dinitrogen pentoxide?
N2O5
Balance the chemical equation:
Cl2 + NaBr --> NaCl + Br2
Cl2 + 2NaBr --> 2NaCl + Br2
A balloon filled with air is put into the freezer.
What will happen to the speed of the molecules, the pressure in the balloon and the volume of the balloon?
Speed of molecules decreases
Pressure decreases
Volume decreases
[Ar] 3d¹⁰ 4s² 4p³
Arsenic
Uranium-233 undergoes alpha decay. What is the resulting species (isotope)?
Th-229
What is the name of this compound?
PbO2
Lead (IV) Oxide
What will be produced?
KBr + AgNO3 -->
KNO3 + AgBr
What is a limiting reactant?
The reactant that prevents you from forming more product (results in the smaller mass of product when comparing two stoichiometry problems)
Average atomic mass of element "X":
X-35 (mass: 34.97 ; abundance: 75.77%)
X-37 (mass: 36.97 ; abundance: 24.23%)
35.45 amu
The half-life of Zn-71 is 2.4 minutes.
There are 100.0 g at the beginning. How many grams would be left after 7.2 minutes has elapsed?
12.5 g
What is the molecular geometry of sulfur dichloride? (hint: draw the Lewis Structure)
Bent
Give the SPECIFIC type of chemical reaction.
HCl(aq)+NaOH(aq)→NaCl(aq)+H2O(l)
Acid-base neutralization reaction
The theoretical yield of copper (from predetermined amounts in a lab, given the equation below) is 72.78g.
3CuCl2 + 2Al--> 2AlCl3 + 3Cu
After conducting the lab your group measured 53.76g of copper. What is the percent yield?
73.87%